Bobby Brown on Bobbi Kristina: 'We could have been better'

By

Yvette C. Hammett

Bobbi Kristina Brown and her boyfriend Nick Gordon attend the premiere of the motion picture drama "Sparkle" in 2012. She was found unresponsive in her bathtub and died in a hospice in July. Her father, Bobby Brown, will appear on 20/20 Tuesday where he will talk about how he and Whitney Houston could have done better with their daughter. FIle photo by Jim Ruymen/UPI | License Photo

Whitney Houston (C) poses with her then-husband, Bobby Brown and their daughter Bobbi Kristina (L) at Disneyland in Anaheim, California in 2004. Bobby Brown will appear on 20/20 Tuesday to discuss how he and Houston could have done a better job with their daughter, who was found unresponsive in her bathtub and died in hospice in July. FIle Photo by Jim Ruymen/UPI | License Photo

Singer Whitney Houston arrives at the Pre-Grammy Gala & Salute to Industry Icons with Clive Davis honoring David Geffen in 2011. Her daughter, Bobbi Kristina was found unresponsive in her bathtub and died at hospice in July. Bobbi Kristina's father, Bobby Brown, will speak about where he and Houston went wrong during 20/20 on Tuesday. File photo by Jim Ruymen/UPI | License Photo

The Fulton County Medical Examiner determined that a combination of drowning and drug intoxication killed her. A toxicology report also showed she had marijuana, alcohol, "a cocaine-related substance," sedatives, anti-anxiety medications and morphine in her system at the time of her death.

"It's not a mystery to me," Brown told Roberts. "The same thing that happened to my daughter is what happened to Whitney."

Brown took some of the blame, but also pointed toward Bobbi Kristina's live-in boyfriend, Nick Gordon. He said Gordon was the only person around both Houston and Bobbi Kristina near their times of death.

Gordon, 26, is the one who found Bobbi Kristina unresponsive. He was never charged by authorities in connection with her death and has publicly denied any wrongdoing.

Houston had taken Gordon in to live with her and Bobbi Kristina when he was just 12 years old and going through a tough period. She never officially adopted him, but Gordon was raised in Houston's house. He and Bobbi Kristina began dating after Houston's death.